.head-bg{
    height: 200px;
    background: url("https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1569661848&di=67e6fca004143cc98be172d8a11aca44&imgtype=jpg&er=1&src=http%3A%2F%2Fi5.3conline.com%2Fimages%2Fpiclib%2F200906%2F30%2Fbatch%2F1%2F36409%2F1246345844086vtm5gmnafc.jpg") no-repeat ;
    background-size: cover;
    margin: 30px 0;
    text-align: center; 
}
.head-bg img{
    height: 100px;
    width: 100px;
    border-radius: 50%;
    margin: 30px 0;
}
.username{
    font-weight: bold;
}